{"product_id":"ocal-h-2-astrophotography-telescope-blem","title":"OCAL H-2 Astrophotography Telescope (Blem)","description":"\u003ch2 data-start=\"0\" data-end=\"64\" style=\"text-align: center;\"\u003eOCAL H-2 206mm f\/2.72\u003c\/h2\u003e\n\u003ch2 data-start=\"0\" data-end=\"64\" style=\"text-align: center;\"\u003eHyperbolic Newtonian Astrograph (H-206)\u003c\/h2\u003e\n\u003cul data-start=\"66\" data-end=\"1907\"\u003e\n\u003cli data-start=\"66\" data-end=\"283\"\u003e\n\u003cp data-start=\"68\" data-end=\"283\"\u003ePurpose-built for astrophotography: a fast \u003cstrong data-start=\"111\" data-end=\"138\"\u003e206 mm aperture, f\/2.72\u003c\/strong\u003e astrograph delivering \u003cstrong data-start=\"161\" data-end=\"172\"\u003e~560 mm\u003c\/strong\u003e focal length for wide-field nebulae, comets, large galaxies, and mosaics without sacrificing fine structure.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"284\" data-end=\"470\"\u003e\n\u003cp data-start=\"286\" data-end=\"470\"\u003e\u003cstrong data-start=\"286\" data-end=\"315\"\u003eFull-frame imaging ready:\u003c\/strong\u003e a \u003cstrong data-start=\"318\" data-end=\"350\"\u003e44 mm corrected image circle\u003c\/strong\u003e with a matched \u003cstrong data-start=\"366\" data-end=\"402\"\u003e4-element apochromatic corrector\u003c\/strong\u003e (includes one super-ED element) keeps stars tight to the corners.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"471\" data-end=\"667\"\u003e\n\u003cp data-start=\"473\" data-end=\"667\"\u003ePremium optics, proven by metrology: \u003cstrong data-start=\"510\" data-end=\"568\"\u003efused-silica primary (hyperboloid) and plane secondary\u003c\/strong\u003e are verified on interferometers and eccentricity meters to ensure top-tier figure and alignment.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"668\" data-end=\"936\"\u003e\n\u003cp data-start=\"670\" data-end=\"936\"\u003eMechanical precision for repeatable results: \u003cstrong data-start=\"715\" data-end=\"742\"\u003e2.5\" dual-speed focuser\u003c\/strong\u003e is \u003cstrong data-start=\"746\" data-end=\"764\"\u003ethread-coupled\u003c\/strong\u003e to the corrector, integrates a \u003cstrong data-start=\"796\" data-end=\"848\"\u003ededicated bearing rotator (CAA) with angle scale\u003c\/strong\u003e, and includes a \u003cstrong data-start=\"865\" data-end=\"898\"\u003efocal-plane adjustment device\u003c\/strong\u003e for easy orthogonality\/tilt tuning.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"937\" data-end=\"1155\"\u003e\n\u003cp data-start=\"939\" data-end=\"1155\"\u003eDesigned to hold focus and kill flex: \u003cstrong data-start=\"977\" data-end=\"1003\"\u003e4 mm carbon-fiber tube\u003c\/strong\u003e, CNC \u003cstrong data-start=\"1009\" data-end=\"1035\"\u003ealuminum clamping hoop\u003c\/strong\u003e (10 mm thick, 22 mm wide), and carefully positioned support points deliver rock-solid rigidity for long imaging runs.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1156\" data-end=\"1330\"\u003e\n\u003cp data-start=\"1158\" data-end=\"1330\"\u003eBuilt-in anti-dew strategy: \u003cstrong data-start=\"1186\" data-end=\"1215\"\u003emicro-heating dew removal\u003c\/strong\u003e plus the included \u003cstrong data-start=\"1234\" data-end=\"1258\"\u003eOCAL anti-dew system\u003c\/strong\u003e protect critical optics through temperature swings and high humidity.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1331\" data-end=\"1532\"\u003e\n\u003cp data-start=\"1333\" data-end=\"1532\"\u003eImaging-friendly backfocus: \u003cstrong data-start=\"1361\" data-end=\"1370\"\u003e55 mm\u003c\/strong\u003e from the corrector to the sensor, with \u003cstrong data-start=\"1410\" data-end=\"1422\"\u003eM48×0.75\u003c\/strong\u003e and \u003cstrong data-start=\"1427\" data-end=\"1439\"\u003eM54×0.75\u003c\/strong\u003e adapter rings for straightforward camera train integration (filter wheels, OAGs, spacers).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1533\" data-end=\"1755\"\u003e\n\u003cp data-start=\"1535\" data-end=\"1755\"\u003eField-smart layout: \u003cstrong data-start=\"1555\" data-end=\"1574\"\u003e80 mm secondary\u003c\/strong\u003e sized for illumination, \u003cstrong data-start=\"1599\" data-end=\"1611\"\u003eNoctutec\u003c\/strong\u003e German anti-reflection paint on the tube interior for superior stray-light control, and smooth, resistance-free rotation for perfect framing.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1756\" data-end=\"1907\"\u003e\n\u003cp data-start=\"1758\" data-end=\"1907\"\u003eCompact, travelable package with pro-grade protection: short overall length, robust build, and a \u003cstrong data-start=\"1855\" data-end=\"1880\"\u003ewheeled aluminum case\u003c\/strong\u003e for dark-site convenience.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch1 data-start=\"1909\" data-end=\"1925\"\u003eSpecifications\u003c\/h1\u003e\n\u003cul data-start=\"1926\" data-end=\"3037\"\u003e\n\u003cli data-start=\"1926\" data-end=\"1957\"\u003e\n\u003cp data-start=\"1928\" data-end=\"1957\"\u003e\u003cstrong data-start=\"1928\" data-end=\"1938\"\u003eModel:\u003c\/strong\u003e OCAL H-2 (H-206)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1958\" data-end=\"2013\"\u003e\n\u003cp data-start=\"1960\" data-end=\"2013\"\u003e\u003cstrong data-start=\"1960\" data-end=\"1979\"\u003eOptical Design:\u003c\/strong\u003e Hyperbolic Newtonian astrograph\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2014\" data-end=\"2070\"\u003e\n\u003cp data-start=\"2016\" data-end=\"2070\"\u003e\u003cstrong data-start=\"2016\" data-end=\"2043\"\u003eAperture: 206mm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2014\" data-end=\"2070\"\u003e\n\u003cp data-start=\"2016\" data-end=\"2070\"\u003e\u003cstrong data-start=\"2016\" data-end=\"2043\"\u003eFocal Ratio:\u003c\/strong\u003e \u003cstrong data-start=\"2058\" data-end=\"2068\"\u003ef\/2.72\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2071\" data-end=\"2104\"\u003e\n\u003cp data-start=\"2073\" data-end=\"2104\"\u003e\u003cstrong data-start=\"2073\" data-end=\"2090\"\u003eFocal Length:\u003c\/strong\u003e \u003cstrong data-start=\"2091\" data-end=\"2102\"\u003e~560 mm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2105\" data-end=\"2150\"\u003e\n\u003cp data-start=\"2107\" data-end=\"2150\"\u003e\u003cstrong data-start=\"2107\" data-end=\"2127\"\u003eImage Circle:\u003c\/strong\u003e \u003cstrong data-start=\"2128\" data-end=\"2148\"\u003e44 mm full-frame\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2151\" data-end=\"2199\"\u003e\n\u003cp data-start=\"2153\" data-end=\"2199\"\u003e\u003cstrong data-start=\"2153\" data-end=\"2187\"\u003eSecondary Mirror (minor axis):\u003c\/strong\u003e \u003cstrong data-start=\"2188\" data-end=\"2197\"\u003e80 mm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2200\" data-end=\"2259\"\u003e\n\u003cp data-start=\"2202\" data-end=\"2259\"\u003e\u003cstrong data-start=\"2202\" data-end=\"2234\"\u003ePrimary\/Secondary Substrate:\u003c\/strong\u003e \u003cstrong data-start=\"2235\" data-end=\"2257\"\u003eFused silica glass\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2260\" data-end=\"2317\"\u003e\n\u003cp data-start=\"2262\" data-end=\"2317\"\u003e\u003cstrong data-start=\"2262\" data-end=\"2291\"\u003ePrimary\/Secondary Figure:\u003c\/strong\u003e \u003cstrong data-start=\"2292\" data-end=\"2315\"\u003eHyperboloid \/ Plane\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2318\" data-end=\"2453\"\u003e\n\u003cp data-start=\"2320\" data-end=\"2453\"\u003e\u003cstrong data-start=\"2320\" data-end=\"2334\"\u003eCorrector:\u003c\/strong\u003e \u003cstrong data-start=\"2335\" data-end=\"2352\"\u003e4-element APO\u003c\/strong\u003e, one super-ED; \u003cstrong data-start=\"2368\" data-end=\"2392\"\u003eclear aperture 56 mm\u003c\/strong\u003e; adapters \u003cstrong data-start=\"2403\" data-end=\"2415\"\u003eM48×0.75\u003c\/strong\u003e \u0026amp; \u003cstrong data-start=\"2418\" data-end=\"2430\"\u003eM54×0.75\u003c\/strong\u003e; \u003cstrong data-start=\"2432\" data-end=\"2451\"\u003ebackfocus 55 mm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2454\" data-end=\"2594\"\u003e\n\u003cp data-start=\"2456\" data-end=\"2594\"\u003e\u003cstrong data-start=\"2456\" data-end=\"2468\"\u003eFocuser:\u003c\/strong\u003e \u003cstrong data-start=\"2469\" data-end=\"2488\"\u003e2.5\" dual-speed\u003c\/strong\u003e, threaded to corrector; \u003cstrong data-start=\"2513\" data-end=\"2536\"\u003ebearing CAA rotator\u003c\/strong\u003e with \u003cstrong data-start=\"2542\" data-end=\"2557\"\u003eangle scale\u003c\/strong\u003e; \u003cstrong data-start=\"2559\" data-end=\"2592\"\u003efocal-plane adjustment device\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2595\" data-end=\"2649\"\u003e\n\u003cp data-start=\"2597\" data-end=\"2649\"\u003e\u003cstrong data-start=\"2597\" data-end=\"2615\"\u003eTube Material:\u003c\/strong\u003e \u003cstrong data-start=\"2616\" data-end=\"2632\"\u003eCarbon fiber\u003c\/strong\u003e, \u003cstrong data-start=\"2634\" data-end=\"2642\"\u003e4 mm\u003c\/strong\u003e wall\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2650\" data-end=\"2717\"\u003e\n\u003cp data-start=\"2652\" data-end=\"2717\"\u003e\u003cstrong data-start=\"2652\" data-end=\"2670\"\u003eTube Interior:\u003c\/strong\u003e \u003cstrong data-start=\"2671\" data-end=\"2683\"\u003eNoctutec\u003c\/strong\u003e special anti-reflection coating\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2718\" data-end=\"2827\"\u003e\n\u003cp data-start=\"2720\" data-end=\"2827\"\u003e\u003cstrong data-start=\"2720\" data-end=\"2738\"\u003eMounting Rings:\u003c\/strong\u003e CNC aluminum, \u003cstrong data-start=\"2753\" data-end=\"2762\"\u003e10 mm\u003c\/strong\u003e thick, \u003cstrong data-start=\"2770\" data-end=\"2779\"\u003e22 mm\u003c\/strong\u003e wide, \u003cstrong data-start=\"2786\" data-end=\"2798\"\u003eØ 254 mm\u003c\/strong\u003e; \u003cstrong data-start=\"2800\" data-end=\"2810\"\u003e10× M6\u003c\/strong\u003e threaded holes\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2828\" data-end=\"2933\"\u003e\n\u003cp data-start=\"2830\" data-end=\"2933\"\u003e\u003cstrong data-start=\"2830\" data-end=\"2845\"\u003eDimensions:\u003c\/strong\u003e \u003cstrong data-start=\"2846\" data-end=\"2863\"\u003eLength 630 mm\u003c\/strong\u003e; \u003cstrong data-start=\"2865\" data-end=\"2882\"\u003etube Ø 254 mm\u003c\/strong\u003e; \u003cstrong data-start=\"2884\" data-end=\"2931\"\u003emax distance between dovetail plates 340 mm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2934\" data-end=\"2981\"\u003e\n\u003cp data-start=\"2936\" data-end=\"2981\"\u003e\u003cstrong data-start=\"2936\" data-end=\"2967\"\u003eWeight (complete bare set):\u003c\/strong\u003e \u003cstrong data-start=\"2968\" data-end=\"2979\"\u003e12.7 kg\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2982\" data-end=\"3037\"\u003e\n\u003cp data-start=\"2984\" data-end=\"3037\"\u003e\u003cstrong data-start=\"2984\" data-end=\"3000\"\u003eDew Control:\u003c\/strong\u003e \u003cstrong data-start=\"3001\" data-end=\"3037\"\u003eMicro-heating dew removal design\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch1 data-start=\"3039\" data-end=\"3059\"\u003eWhat’s in the box?\u003c\/h1\u003e\n\u003cul data-start=\"3060\" data-end=\"3414\"\u003e\n\u003cli data-start=\"3060\" data-end=\"3153\"\u003e\n\u003cp data-start=\"3062\" data-end=\"3153\"\u003e\u003cstrong data-start=\"3062\" data-end=\"3094\"\u003eOCAL H-2 telescope main body\u003c\/strong\u003e (tube clamp, dovetail plate, focuser, matched corrector)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3154\" data-end=\"3182\"\u003e\n\u003cp data-start=\"3156\" data-end=\"3182\"\u003e\u003cstrong data-start=\"3156\" data-end=\"3180\"\u003eOCAL anti-dew system\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3183\" data-end=\"3218\"\u003e\n\u003cp data-start=\"3185\" data-end=\"3218\"\u003e\u003cstrong data-start=\"3185\" data-end=\"3216\"\u003eWheeled aluminum carry case\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3219\" data-end=\"3268\"\u003e\n\u003cp data-start=\"3221\" data-end=\"3268\"\u003e\u003cb\u003eQuick Start Guide\u003c\/b\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3269\" data-end=\"3333\"\u003e\n\u003cp data-start=\"3271\" data-end=\"3333\"\u003e\u003cstrong data-start=\"3271\" data-end=\"3304\"\u003eScrewdrivers and hex wrenches\u003c\/strong\u003e for collimation\/adjustment\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3334\" data-end=\"3372\"\u003e\n\u003cp data-start=\"3336\" data-end=\"3372\"\u003e\u003cstrong data-start=\"3336\" data-end=\"3370\"\u003eData cables and DC power wires\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3373\" data-end=\"3414\"\u003e\n\u003cp data-start=\"3375\" data-end=\"3414\"\u003e\u003cstrong data-start=\"3375\" data-end=\"3400\"\u003eM48×0.75 and M54×0.75\u003c\/strong\u003e adapter rings\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch1 data-start=\"3416\" data-end=\"3433\"\u003eSoftware \u0026amp; Docs\u003c\/h1\u003e\n\u003cul data-start=\"3434\" data-end=\"3861\" data-is-last-node=\"\" data-is-only-node=\"\"\u003e\n\u003cli data-start=\"3434\" data-end=\"3477\"\u003e\n\u003ca href=\"https:\/\/download.ocalworld.com\/pdf\/en\/OCAL%20H-2manual.pdf\" title=\"OCAL H2 Manual\"\u003e\u003cstrong data-start=\"3436\" data-end=\"3466\"\u003eManual\u003c\/strong\u003e\u003c\/a\u003e\u003cstrong data-start=\"3436\" data-end=\"3466\"\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OCAL","offers":[{"title":"Default Title","offer_id":52877760397632,"sku":"Ocal-H2-Blem","price":4500.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0717\/9904\/6464\/files\/1_ef9c9bf7-d9cc-4ac7-b58f-4b023d66f3ae.png?v=1764882736","url":"https:\/\/astroworldtelescopes.com\/products\/ocal-h-2-astrophotography-telescope-blem","provider":"Astroworld Telescopes","version":"1.0","type":"link"}